Twelve
The triliteral root ʿayn shīn rā (ع ش ر) occurs in the Quran 27 times.
In the Quran
(7:160) We separated them into twelve tribes as nations; and We inspired Moses when his people wanted to drink: "Strike the rock with your staff," thus twelve springs burst forth. Every group knew where from to drink. We shaded them with clouds and We sent down to them manna and quail: "Eat from the good things that We have provided for you." They did not wrong Us, but it was themselves that they wronged.
See Also
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 19, 20, 30, 40, 50, 60, 70, 80, 99, 100, 200, 300, 1000, 2000, 3000, 5000, 50.000, 100.000.
